Yep it is a wonderful design that needed minor refinement. There is a bad
pocket above the exhaust valve, and the piston doesn't present the full area
to early expansion (reduces torque in early part of power stroke).
PVS
-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com]On Behalf Of Kent Kinard
Sent: Wednesday, 8 March 2006 10:45 am
To: rovernet at lyris.ccdata.com
Subject: Re: [ROVERNET - UK] Slightly OT but not quite
Oh well, my email program decided to send that last bit before I was
finished...
F-heads have broad, flat combustion chambers what present problems with
flame propagation and their exhaust valves are necessarily shrouded by
the cylinder head. The Rover IOE has a very compact, almost "perfect"
hemi combustion chamber with a relatively unshrouded exhaust valve.
Roverly,
Kent K.
iudkuy wcygiohs wrote:
> According to James Taylor's book "Rover P4 The
> Complete Story", the engine was originally designed in
> the mid-thirties as a V6 by Rover's Chief Engine
> Designer.Because of the width of thirties cars'
> bonnets he "angled the cylinder heads so that the
> rockers for the overhead inlet valves would be on top
> of the engine and would not increase its width."
>> RR seems to have been working on a similar design for
> their in-line engines at the same time, but their
> concern was an inability to reliably cast heads for
> the small six cylinder cars with predictable
> waterways. Their F-Head engines were much larger than
> Rovers, the smallest being 4257cc and the largest, a
> straight 8 of 5675cc.
>> Thanks for giving my library a workout
>> Peter B
>>>> Jack Swaine --- JOHN
> <john.at.hulverstone at btinternet.com> wrote:
>>>>I heard many years ago, that the engine in the P4
>>was
>>designed by R.R. but I hadn't heard of any being
>>made
>>for R.R. by Rover. That P.4 engine was used in some
>>London black cabs
>>best wishes
>>John
>>--- Ray <raywilkins at optusnet.com.au> wrote:
>>>>>>>I have just bought the February edition of the UK
>>>mag 'Classics'. Yes, I
>>>know we get it about 2 months late seeing as
>>>>though
>>>>>we are on the other side
>>>of the world and it has to come out by Tea Clipper
>>>etc etc.
>>>One of the articles concerned a Rolls Royce Merlin
>>>V12 (from a WWII
>>>Hurricane fighter) put into RR Phantom based
>>>>chassis
>>>>>and handmade bodywork.
>>>Very interesting. It made mention that the engine
>>>was a genuine Rolls Royce
>>>and not a Rover built version. Can anyone expand
>>>>on
>>>>>this? Did Rover make
>>>these engines in wartime? And were they only used
>>>>in
>>>>>fighter planes? I've
>>>not researched this topic extensively but I do
>>>>know
>>>>>of a Rod Hadfield from
>>>Castlemaine here in Oz who put a supercharged
>>>>Merlin
>>>>>V12 in a custom built
>>>'55 Chevvy which was supposedly the most powerful
>>>road registered car in the
>>>world! The website is
>>>www.rodshop.com.au/project55.htm.
>>>It would be interesting to hear of Rover's
>>>involvement with these engines.
>>>>>>Cheers,
>>>>>>Ray Wilkins
>>>Melbourne, Australia
>>>1976 P6B
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